Take your pick. The US has a long history of effecting regime change by a combination of covert support for rebels and overt military action. See Laos, Cambodia, Yugoslavia, Syria, Libya, and more that I am surely forgetting. Staging an Iraq-style full-scale invasion for the purpose of regime change is the exception, not the norm.
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So you think the US can successfully accomplish a regime change solely by aerial attacks? You also think that Saudi Arabia, whose limited airforce currently requires US assistance for their war in Yemen, would fight alongside Israel, whose PM has already publically stated they would not get involved in this conflict the US started?
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